Air distributing duct



W. G. RICHARDSON AIR DISTRIBUTING DUCT Filed July '7, 1944 O O Q G Feb19, 1946.

F1 .2. g a INVENTOR.

wz'ZZz'am G. Richardson.

W a. 'Aff/EMF A-lll A Patented Feb. 19, 1946 UNITED STATES PATENT OFFICEAIR DISTRIBUTING DUCT William Goodwin Richardson, Westwood, Mass.Application July 7, 1944, Serial No. 543,937

3 Claims.

This invention relates to ventilating and air conditioning systems andrelates more particularly to the distribution of air from such systems.

This invention provides an air distributingduct which may bein the formof an oversized mop board or base board which will extend around thesides of a room, and distribute air into the room from a plurality ofpoints. The duct may be used at the floor of the room for distributingheated air; or used as a ceiling molding'ior distributing chilled air.Such duct are particularly suitable for older type buildings where it isdif ficult to conceal duct work.

A feature of this invention resides in providing in-such a duct, aninner chamber into which the conditioned air is supplied under pressure,the inner chamber having a Wall containing a large plurality ofrelatively small perforations which discharge the air at a relativelyhigh velocity into an outer chamber. The air expands in this outerchamber and is discharged through relatively large apertures and at arelatively low velocity into the room.

Objects of the invention are to distribute air uniformly and at lowvelocity into a room, and to accomplish this with a decorative ductwhich can readily be applied around the sides of a room to be suppliedwith conditioned air.

The invention will now be described with reference to the drawing, ofwhich:

Fig. 1 is a side elevation, partially in section of 1 a duct embodyingthis invention and formed as a base board around the sides of a room,and

Fig. 2 is a diagrammatic plan View of a room utilizing the duct of Fig.1, and illustrates the air supply to and the distribution from, theduct.

The duct has the back wall 5 which is adapted to be placed against theinner surface of a vertical Wall of the room. The wall 6 having theperforations l, is arranged parallel to the wall 5 and spaced therefromand has the horizontal upper portion 8 which contacts and i attached tothe wall 5.

The walls 5 and 6 form an inner chamber 9 which is connected by thesupply duct ID with a conventional ventilating, heating or airconditioning system which is not illustrated and which is of the typewhich supplies air under substantial static pressure through the duct I0into the passage 9.

The decorative outer wall I I ha the curved up per portion I 2 which isattached to the upper end of the wall 5, the lower portion of the wall Hbeing spaced from and extending parallel to the iii of the wall l2interconnects the walls II and ti and forms therebetween the outerexpansion chamber l3.

The wall I I has the closely spaced outlets (4 adjacent and extendingparallel to the floor of the room, and has the upper outlets 15 adjacentthe sides of the room and discharging air parallel thereto. I

The above described duct preferably extends around the four sides of theroom, being continuous except for door passages.

As illustrated by Fig. 2, there may be two oppositely disposed supplyducts [0. One or more than two ducts It! may be provided.

In operation, the duct l0 supplies air under pressure into the innerchamber 9. Due to the small outlet l, a uniform static pressure is builtup in all portions of the inner chamber 9. The air issues from theapertures 1 at a relatively high velocity which may, for example, be3,000 feet per minute.

The discharge outlets l 4 and I 5 have total areas substantially largerthan the total areas of the apertures 1 whereby the air is dischargedinto the room at a relatively low velocity which may, for

example, be 500 feet per minute.

The use of the double plenum chamber in the duct thus provides uniformdistribution all around the room, yet with low velocity discharge intothe room.

The wall I I may be of wood or of metal treated to imitate wood so as toblend artistically with the room interior.

perforated wall 6. The horizontal lower portion 55 The above-describedfeatures could, of course,

i be included in a duct adjacent the ceiling of the room as probablywould be preferred for distributing chilled air. Ducts embodying theinvention thus could be used adjacent the floor of the room fordistributing heated air, and adjacent the ceiling of the room fordistributing chilled air.

While one embodiment of the invention has been described for the purposeof illustration, it should be understood that the invention is notlimited to the exact apparatus illustratedas modifications thereof maybe suggested by those killed in the art without departure from theessence of the invention.

What is claimed is:

1. An air distributing, duct for placement against, and for extensionalong, the vertical side of a room, comprising a relatively long, arelatively high and a relatively narrow casing having a base forplacement on the floor of said room, an inner wall extendingsubstantially vertically from said base, and a partition in said casinghaving a substantially vertical portion spaced from said wall and havingan upper portion conmeeting with said wall below the upper end thereof,said partition dividing said casing into inner and outer chambers, theupper portion of said outer chamber extending over said inner chamber,said partition having aplurality of relatively small apertures therein,said casing having an inlet in said base thereof for connecting saidinner chamber, to an air supply duct the outer wall 01' said casinghaving: a plurality of outlets therein above said upper portion of saidpartition, the area of said outlets being substantially greater than thearea of said apertures whereby the air from said outer chamber isdischarged upwardly above said inner chamber into the room at a velocitysubstantially less than the air is discharged through said aperturesfrom said inner chamber into said outer chamberl 2. An air distributingduct for placement against, and for extension along, the:v side of aroom, comprising a relatively long,. a; relatively high and a relativelynarrow casing; having; a substantially vertical inner wall, apartition,in said casing. having a substantially vertical: portion spaced fromsaid Wall andhav-ing; an upper portion connecting: with said wall, saidpartition dividing said easing into inner and outer chambers, saidpartition having a plurality of relatively small apertures: therein,said casing having an inlet in the basethereof. iior connecting saidinner chamber to an air supply duct, means forming an air outlet in the;outer wall of said casing for directing air from said: outer chamberalong substantially vertical lines, and means forming an. air outlet insaid outer wall of said. casing for directing air from said outerchamber along, substantially horizontal lines, the area of said outletsbeing substantially greater than the area of said apertures whereby theair from said outer chamber is discharged into the room at a velocitysubstantially less than the air is discharged through said aperturesfrom said inner chamber into said outer chamber.

3. An air distributing duct for placement against, and. for extensionalong, the side of a room, comprising, a relatively long, a. relativelyhigh and a relatively narrow casing having a substantially verticalinner wall, a partition in said casing having a substantially verticalportion spaced: from said wall and having an upper portion connectingwith said wall; said partition dividing said casing into inner and outerchambers,. said partition having a plurality of relatively smallapertures therein, said casing having an inlet in the base thereof forconnecting said inner chamber to an air supply duct, means forming anair outlet in the upper portion. of the outer wall of said casing. fordirecting. air from said outer chamber along substantially-verticallines, and means forming an. air outlet in the lower portion of saidouter wall of said casing for directing, air from said outer chamberalong substantially horizontal lines, the area of said outlets; beingsubstantially greaterthan the area of said apertures whereby the airfrom said outer chamber is discharged into the room ata velocitysubstantially less than the air is discharged through said aperturesfrom said. inner chamber into said outer chamber.

WILLIAM- GOODWIN RICHARDSON.

